{"reference": {"slug": "greubel-forsey-double-tourbillon-30", "brand": "Greubel Forsey", "ref": "DT30", "model": "Double Tourbillon 30° Édition Historique", "case_material": "Platinum", "url": "https://mostexpensivewatches.net/reference/greubel-forsey-double-tourbillon-30"}, "listing_stats": {"count": 0, "median": 0, "low": 0, "high": 0}, "listings": [], "auction_lots": [{"slug": "greubel-double-tourbillon-30-prototype", "brand": "Greubel Forsey", "reference": "DT30", "model": "Double Tourbillon 30° Édition Historique", "case_material": "Platinum", "hammer_usd": 685000, "year_sold": 2024, "venue": "Phillips Geneva", "lot_summary": "Inner tourbillon cage inclined 30° within outer cage. Greubel's first invention. Production ~50/yr across the entire brand.", "url": "https://mostexpensivewatches.net/auctions/greubel-double-tourbillon-30-prototype"}]}